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Restricted Available-for-Sale Investments (Tables)

3 Months Ended

Mar. 31, 2023

Investments Debt And Equity Securities [Abstract]

Reconciliation of Restricted Available-for-sale Investments

The following table reconciles the amortized cost, gross unrealized gains and losses included in accumulated other comprehensive income or loss, and estimated fair value of the Company’s restricted available-for-sale investments as of the periods indicated:

		March 31, 2023
Dollars in thousands		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Estimated Fair Value
Restricted investments		$	22,968			$	—			$	(479	)		$	22,489

		December 31, 2022
Dollars in thousands		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Estimated Fair Value
Restricted investments		$	21,158			$	—			$	(742	)		$	20,416

Summary of Gross Unrealized Losses And Estimated Fair Values of Restricted Available-For-Sale Investments

The following table includes the gross unrealized losses and estimated fair values of restricted available-for-sale investments that were in a continuous unrealized loss position, for which no allowance for credit loss has been recorded, as of the periods indicated:

		March 31, 2023
		Less than 12 Months								12 Months or Longer								Total
Dollars in thousands		Estimated Fair Value				Gross Unrealized Losses				Estimated Fair Value				Gross Unrealized Losses				Estimated Fair Value				Gross Unrealized Losses
Restricted investments		$	22,489			$	(479	)		$	—			$	—			$	22,489			$	(479	)

		December 31, 2022
		Less than 12 Months								12 Months or Longer								Total
Dollars in thousands		Estimated Fair Value				Gross Unrealized Losses				Estimated Fair Value				Gross Unrealized Losses				Estimated Fair Value				Gross Unrealized Losses
Restricted investments		$	20,416			$	(742	)		$	—			$	—			$	20,416			$	(742	)

Summary of Amortized Cost And Estimated Fair Values of Restricted Available-For-Sale Investments by Contractual Maturity

The following table includes the amortized cost and estimated fair values of restricted available-for-sale investments by contractual maturity as of the periods indicated:

		March 31, 2023
Dollars in thousands		Amortized Cost				Estimated Fair Value
Due in one year		$	4,037			$	4,020
Due within one year to five years			18,931				18,469
Due within five years to ten years			—				—
Due after ten years			—				—
Total restricted available-for-sale investments		$	22,968			$	22,489

Summary of Proceeds from Sold or Matured Restricted Available-For-Sale Investments

The following table includes the proceeds from sold or matured restricted available-for-sale investments for the periods indicated:

		Three Months Ended
Dollars in thousands		March 31, 2023				March 31, 2022
Purchase of restricted available-for-sale investments		$	1,900			$	—

X

- Definition

Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 55
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455

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- Definition

Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.

+ References

No definition available.

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- Definition

Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value.

+ References

No definition available.

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- Definition

Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
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